4566704
a6ba78c92c
- SendToMail 支持收/抄/密送与回复地址、HTML 或文本正文 - 附测试、examples/mail 例程与包 README(注明不支持 465 加密端口)
41 lines
1.4 KiB
Go
41 lines
1.4 KiB
Go
// Package mail 封装 SMTP 邮件发送。
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package mail
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import (
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"net/smtp"
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"strings"
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)
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// SendToMail 通过 SMTP 发送邮件
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// user/password 为 SMTP 账号与密码（或授权码）；host 如 "smtp.example.com:25"
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// mailType 为 "html" 时正文按 HTML 发送，其他值按纯文本发送
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// to/cc/bcc 分别为收件人/抄送/密送列表
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func SendToMail(user, password, host, from, subject, body, mailType, replyToAddress string, to, cc, bcc []string) error {
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hp := strings.Split(host, ":")
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auth := smtp.PlainAuth("", user, password, hp[0])
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var contentType string
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if mailType == "html" {
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contentType = "Content-Type: text/" + mailType + "; charset=UTF-8"
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} else {
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contentType = "Content-Type: text/plain" + "; charset=UTF-8"
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}
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ccAddress := strings.Join(cc, ";")
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bccAddress := strings.Join(bcc, ";")
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toAddress := strings.Join(to, ";")
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msg := []byte("To: " + toAddress + "\r\nFrom: " + from + "\r\nSubject: " + subject + "\r\nReply-To: " + replyToAddress + "\r\nCc: " + ccAddress + "\r\nBcc: " + bccAddress + "\r\n" + contentType + "\r\n\r\n" + body)
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sendTo := MergeSlice(to, cc)
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sendTo = MergeSlice(sendTo, bcc)
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err := smtp.SendMail(host, auth, user, sendTo, msg)
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return err
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}
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// MergeSlice 合并两个字符串切片（用于合并收件人列表）
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func MergeSlice(s1 []string, s2 []string) []string {
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slice := make([]string, len(s1)+len(s2))
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copy(slice, s1)
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copy(slice[len(s1):], s2)
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return slice
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}
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